Abstract

Coefficients of absorption for the O<sub>2</sub> Schumann-Runge continuum have been measured in the range 1270 Å ↔ 1745 Å. For the measurement, a microsecond flashing source with continuous spectral energy distribution and photographic detection techniques have been utilized. In previous measurements, H<sub>2</sub> discharges had been used almost exclusively. Three independent determinations by photographic photometry had given maximum coefficients of absorption between 460 cm<sup>-1</sup> and 490 cm<sup>-1</sup> (STP), whereas three independent photoelectric investigations yielded values between 390 cm<sup>-1</sup> and 403 cm<sup>-1</sup> the accuracy of the latter were estimated to be 5%–10%. Similar disagreement existed on the continuum oscillator strength. Our determination yields, for the maximum coefficient of absorption, 382 cm<sup>-1</sup>±10% and ƒ= 0.156, which is in good agreement with photoelectric measurements. Therefore, the formerly indicated discrepancy between photographic and photoelectric photometric techniques no longer exists.

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  1. G. H. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand Company, Inc., Princeton, N. J., 1950), 2nd ed.
  2. R. Ladenburg and C. C. Van Vorrhis, Phys. Rev. 43, 315 (1933).
  3. E. C. Schneider, J. Chem. Phys. 5, 106 (1937).
  4. R. W. Ditchburn and D. W. O. Heddle, Proc. Roy. Soc. (London) A220, 61 (1953).
  5. K. Watanabe, M. Zelikoff, and E. C. Y. Inn, J. Chem. Phys. 21, 1026 (1953); 25, 965 (1956).
  6. P. H. Metzger and G. R. Cook, J. Quant. Spectry. Radiative Transfer 4, 107 (1964).
  7. R. E. Huffman, Y. Tanaka, and J. C. Larrabee, Discussions Faraday Soc. 37, 159 (1964).
  8. TRW Instruments Technical Data Bulletin CRS-1.
  9. J. Eggert, in Scientific Photography, Proceedings of the International Colloquium, Liege, 1959 (The Macmillan Co., New York, 1961), pp. 401–424.
  10. J. Castle, W. Woodbury, and Warren A. Shelton, in Proceedings of the Third International Congress on High Speed Photography, London, 10–15 Sept. 1956 (Butterworths Scientific Publications, Ltd., London, 1957), pp. 219–224.
  11. W. G. Hyzer, Engineering and Scientific High Speed Photography (The Macmillan Co., New York, 1962), pp. 204–209.
  12. J. K. Crosby, in Proceedings of the Sixth International Congress on; High Speed Phiotography, The Hlague/Scheveningen (Netherlands), 17–22 Sept. 1962 (H. D. Tjeenk Willink & Zoon, N. V., Haarlem, 1963), pp. 378–382.

Castle, J.

J. Castle, W. Woodbury, and Warren A. Shelton, in Proceedings of the Third International Congress on High Speed Photography, London, 10–15 Sept. 1956 (Butterworths Scientific Publications, Ltd., London, 1957), pp. 219–224.

Cook, G. R.

P. H. Metzger and G. R. Cook, J. Quant. Spectry. Radiative Transfer 4, 107 (1964).

Crosby, J. K.

J. K. Crosby, in Proceedings of the Sixth International Congress on; High Speed Phiotography, The Hlague/Scheveningen (Netherlands), 17–22 Sept. 1962 (H. D. Tjeenk Willink & Zoon, N. V., Haarlem, 1963), pp. 378–382.

Ditchburn, R. W.

R. W. Ditchburn and D. W. O. Heddle, Proc. Roy. Soc. (London) A220, 61 (1953).

Eggert, J.

J. Eggert, in Scientific Photography, Proceedings of the International Colloquium, Liege, 1959 (The Macmillan Co., New York, 1961), pp. 401–424.

Heddle, D. W. O.

R. W. Ditchburn and D. W. O. Heddle, Proc. Roy. Soc. (London) A220, 61 (1953).

Herzberg, G. H.

G. H. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand Company, Inc., Princeton, N. J., 1950), 2nd ed.

Huffman, R. E.

R. E. Huffman, Y. Tanaka, and J. C. Larrabee, Discussions Faraday Soc. 37, 159 (1964).

Hyzer, W. G.

W. G. Hyzer, Engineering and Scientific High Speed Photography (The Macmillan Co., New York, 1962), pp. 204–209.

Inn, E. C. Y.

K. Watanabe, M. Zelikoff, and E. C. Y. Inn, J. Chem. Phys. 21, 1026 (1953); 25, 965 (1956).

Ladenburg, R.

R. Ladenburg and C. C. Van Vorrhis, Phys. Rev. 43, 315 (1933).

Larrabee, J. C.

R. E. Huffman, Y. Tanaka, and J. C. Larrabee, Discussions Faraday Soc. 37, 159 (1964).

Metzger, P. H.

P. H. Metzger and G. R. Cook, J. Quant. Spectry. Radiative Transfer 4, 107 (1964).

Schneider, E. C.

E. C. Schneider, J. Chem. Phys. 5, 106 (1937).

Shelton, Warren A.

J. Castle, W. Woodbury, and Warren A. Shelton, in Proceedings of the Third International Congress on High Speed Photography, London, 10–15 Sept. 1956 (Butterworths Scientific Publications, Ltd., London, 1957), pp. 219–224.

Tanaka, Y.

R. E. Huffman, Y. Tanaka, and J. C. Larrabee, Discussions Faraday Soc. 37, 159 (1964).

Van Vorrhis, C. C.

R. Ladenburg and C. C. Van Vorrhis, Phys. Rev. 43, 315 (1933).

Watanabe, K.

K. Watanabe, M. Zelikoff, and E. C. Y. Inn, J. Chem. Phys. 21, 1026 (1953); 25, 965 (1956).

Woodbury, W.

J. Castle, W. Woodbury, and Warren A. Shelton, in Proceedings of the Third International Congress on High Speed Photography, London, 10–15 Sept. 1956 (Butterworths Scientific Publications, Ltd., London, 1957), pp. 219–224.

Zelikoff, M.

K. Watanabe, M. Zelikoff, and E. C. Y. Inn, J. Chem. Phys. 21, 1026 (1953); 25, 965 (1956).

Other (12)

G. H. Herzberg, Spectra of Diatomic Molecules (D. Van Nostrand Company, Inc., Princeton, N. J., 1950), 2nd ed.

R. Ladenburg and C. C. Van Vorrhis, Phys. Rev. 43, 315 (1933).

E. C. Schneider, J. Chem. Phys. 5, 106 (1937).

R. W. Ditchburn and D. W. O. Heddle, Proc. Roy. Soc. (London) A220, 61 (1953).

K. Watanabe, M. Zelikoff, and E. C. Y. Inn, J. Chem. Phys. 21, 1026 (1953); 25, 965 (1956).

P. H. Metzger and G. R. Cook, J. Quant. Spectry. Radiative Transfer 4, 107 (1964).

R. E. Huffman, Y. Tanaka, and J. C. Larrabee, Discussions Faraday Soc. 37, 159 (1964).

TRW Instruments Technical Data Bulletin CRS-1.

J. Eggert, in Scientific Photography, Proceedings of the International Colloquium, Liege, 1959 (The Macmillan Co., New York, 1961), pp. 401–424.

J. Castle, W. Woodbury, and Warren A. Shelton, in Proceedings of the Third International Congress on High Speed Photography, London, 10–15 Sept. 1956 (Butterworths Scientific Publications, Ltd., London, 1957), pp. 219–224.

W. G. Hyzer, Engineering and Scientific High Speed Photography (The Macmillan Co., New York, 1962), pp. 204–209.

J. K. Crosby, in Proceedings of the Sixth International Congress on; High Speed Phiotography, The Hlague/Scheveningen (Netherlands), 17–22 Sept. 1962 (H. D. Tjeenk Willink & Zoon, N. V., Haarlem, 1963), pp. 378–382.

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